Definitions

from The Century Dictionary.

  • noun A numerical constant, proportional to the capacity and resistance of a telephone-line, which gives the maximum distance over which speech may be successfully transmitted.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun physics The difference in phase shift between two characteristic polarizations of light upon reflection from an interface. Retardance can be reported in the Abelès or Mueller conventions. The retardance phase shift angle is often specified in degrees.

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